Don't push hard on the tip of the emulsifier (in the carburetor venturi) with any metal object. The tip is recessed and shaped to emit the right amount of fuel under venturi vacuum, and the emulsifier is only brass, not steel. Blast carb cleaner up the tube the emulsifier is stuck in, then push it downward from the venturi with the side of a wood or metal cylinder. If it won't move, use more carb cleaner, or soak it again in carb cleaner. That will soften the gum - just don't get impatient and use a metal object to push it. And don't ask me how I know not to use a metal object to push it:

[Linked Image]
[Linked Image]